Improvement in sectional steam-bohers



G. H. BABCUCK 8.1. W-ELCX.

, Secinna'l Steam-Boilers. No, 134,505.

Patented 1an. 7, 1873l Wwnwwm I .N mmm *u I 4 v u y WMS y ifi/OQ L GEORGE H. BABOOOK, OF PLAINFIELD, NEW JERSEY, AND STEPHEN WILd COX, OF BROOKLYN, NEVr YORK.

IMPROVEMENT IN SECTIONAL STEAM-BOWERS.

Specification forming part of Letters Patent No. 134,505, dated January 7, 1873.

To all whom it may concern:

Be it known that we, GEORGE H. BABeooK, of Plainfield, Union county, New Jersey, and STEPHEN WILcoX, of Brooklyn, Kings county, New York, have invented certain Improvements in Steam-Boilers, of which the following is a specification:

- We employ a series of elongated chambers or tubes arranged side by side, and so connected together and to a series of steam-generatin gtubes below as to secure a complete system of circulation through all the tubes and chambers, while, the steantgenerating tubes being above and each side of the furnace, the hot products of combustion are efficiently ap plied to the-heating-surface.

The following is a description of what we consider the best means of carrying out the invention.

The accompanying drawing forms a part of this specification.

Figure 1 is a vertical cross-section on the line S S in Fig. 2. Fig. 2 is a central longitudinal section.

Similar lettersof reference indicatelike parts in boththe gures.

A is the grate; A1, a slightly-inclined wall forming the back of the furnace; and A2 A2 are the sides of the furnace. These walls of the furnace are of brick, and are inclosed, as is also the entire structure, in a casing of iron, partly wrought and partly cast, as will be understood from the drawing. The casing may be double, with an air-space between, or other provisions may be made for retardin g the escape of heat through this casing. B B B are slightly-inclined cylindrical vessels, in which the separation of the steam from the water is Y effected. As ordinarily worked these vessels six sets of these inclined tubes. One set, composed of three, one above the other, is marked G1, and is mounted on one side of the furnace. Another corresponding set, marked O2, is mounted on the other side ofthe furnace, and four sets, marked D, are mounted between them. The sets C1 O2 are inclined in the opposite direction to the other sets D. The tubes O1 O2 are lowest at their forward ends, and the steam which is generated in them moves backward in rising and enters a series of back connections, E. In this the steam mingled with water moves horizontally a little distance, and thus obtains access to the lower ends of the several tubes D. These tubes are inclined in highest, and the mingled steam and water rising in these tubes D moves forward activelyV to the highest tubes or connections B at the front of the boiler, in which latter the mingled steam Aand water rises to be distributed and separated in the top series of vessels B. We provide liberally for the descent of the water to complete the circulation by vertical connections F at each side of the front. Through these the dense water descends freely, and is presented again at the lower front ends of the respective side tubes O1 (l2 to again commence its upward circuitous journey. The front of the furnace is formed of brick resting on an arch casting, A4. There are one or more doors, not represented, which close the mouth in the ordinary manner. The air is supplied to the furnace by natural draft or otherwise in the ordinary or any suitable manner. The heat from' the incandescent fuel is radiated upon the side pipes O1 O2; also upon the central pipes D. Only a small amount of this radiant heat is allowed to pass'through the spaces between the pipes, and this is received on the brick or other surfaces, and is stored and reflected or radiated back, so that it is efliciently utilized. A thin deiecting-plate, N, mount ed above the front half of the tubes D, arrests the products of combustion and detains them under it, allowing them to be discharged upward only at the back end.- The gases rising in rear of the back edge of the plate N are again arrested and retained by thin metal stops P resting on the tubes B at the back part of their length, and allowed to rise only through the spaces between the tubes or vessels B near the front. From thence they ow back again to the uptake or chimney O, which is represented as provided with a notch to receive a damper, and may have a chimney, of iron or other material, leading up therefrom, as will be understood. The stops P are light Y and cheap. They are merely pieces of sheet- VD are supported upon a corresponding shelf formed in the back of the casing. The lowermost of the back connections E rest directly upon the shelf, or on bricks, or the like resting thereon; and the several back connections above rest upon it and upon each other, as clearly shown in Fig. 2, where G are thin pieces of brick or metal resting directly on the shelf Q, and supporting the lowermost of the back connections E, and e are ridges cast on the several back connections, which aid to support the back connection immediately above it. A vertical plate, H, is introduced above to fill the space between the uppermost of the back connections E and the lowermost of the cross-connections B2 above. This is represented as lined with fire-brick, and that again with metal. The ends of the larger vessels B are constructed with haudholes, provided with proper means for secnrin g the same, as represented. The sides of the back connections are stopped simply with large screw-plugs. M is a cylindrical vessel, serving as a mud-drum. It extends across the front of the boiler, under the fire-doors, and may connect to the front ends of the side tubes Cl G2 with any ordinary or suitable provision for removing at intervals the solid material which tends to collect therein. The water in the mud-drum is at rest; in all the other vessels it is moderately moving. It moves backward through the central vessel of the upper series B, and forward again through the outer portion of the respective side vessels of that series. It descends thence through the connections F at each side, and thence rises and moves backward through the side inclined pipes C1 C2, and, moving laterally in the back connections E, rises again and moves forward in the central inclined sets of pipes D, to be delivered with its steam in the front chamber B1 of the top vessels B again. Y

We claim as our invention- 1. The within-described seriesv of pipes D C1 C2 with the front connections F and back connections E arranged relatively to each other and to the furnace, and to suitable provisions for allowing the steam and water to separate, substantially as herein specified.

2. In combination, the central and side vessels of the upper series B, the connections F at each side, the side inclined pipes C1 G2, and the opposite inclined sets D, all as and for the purposes herein specilied.

In testimony whereof we have hereunto set our hands this 15th day of July, 1872, in the presence of two subscribing witnesses.

GEO. H. BABCOCK. STEPHEN WILOOX.

Witnesses:

W. C. Dnv, f ARNOLD HRMANN. y 

